Coal-cutting machine



Feb. 19, 1929. 1,702,441

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COAL puw'rme momma Filed Feb. 15. 1926 3 Sheets-Sheet l Feb. 19, 1929. 1,702,441

- A. Y. HOY

coAL cuwwme wggguns I Filed Feb. 15, 1926 s Sheets-Sheet 2* Y [raven/$07":

12/5267? Yawn/915mg.

W W I AZZorney.

Patented Feb. 19, 1929.

UNITED STATES PATENT. OFFICE.

AUSTIN YOUNG I-IOY, OF LONDON, ENGLAND,ASSIGNOR'TO SULLIVAN MACHINERY COMPANY, OF CHICAGO,'ILLINOIS, A GORPORATIONOF MASSACHUSETTS.

COAL-CUTTING MACHINE.

Application filedFebruary 15, 1926, Serial No. 8 8,404,:and in Great Britain May 13, 11925.

This invention relates to coal-cutting machines of the swinging-jib type, and has for, its main object to p-rovid'ean improved form of lock for holding thejib securely in its adjusted position during cutting. It is sometimes necessary, particularly when using this type'of machine for shearing, to be able to al- I ter the angle of the jib by very small amounts iii-order that the free end of the jib may be in brought to the height required for any particular working, and it is necessary to hold it firmly in any of the numerous positions to which it is thus adjusted.

The present invention comprises'therefore,

1.1 in a mining machine havinga swinging cutting member, the combination of a part moving with the cutting member and provided I with bolt-holes, or equivalent recesses, a part of themachine fixed relatively to said cutting member and provided with corresponding bolt-holes or equivalent recesses,the bolt-holes or recesses in said part of the machine and in the part moving with the cutting member being in Vernier relationship to one another, and a locking bolt or key to fit. pairs of the bolt-- holes .or recesses when the said holes or re-- cesses of a pair are brought into coincidence in the adjustment of the cutting member about its axis of rotation. The purpose of this is to provide a construction, wherein with a certainnumber of locking holes or recesses in boththe sets coincidence of the holes shall occur and the two parts shall be positively lockable by the bolt or keyat angular intervals in the range of adjustment of the cutting member thatare substantially smaller than the angular distances by which the lockingholes or recesses in either set are separated from one another. j I x The holes in each of the aforesaid parts may, for instance, be in a circle or in aplurality of concentric circles; in the latter case ample metal is left between neighbouring holes to resist working stresses. Preferably, each set of holes is arranged in a plurality of concentric circles and the holes in one circle arestaggered in relation tothe holes in an: other circle.

The accompanyingdiagrammaticdrawings show various applications of the invention to a coal-cutting machine of the swinging jib type. v a

In these drawings: f j Figure 1 is an underplan or side view ofia machine showing the jib invarious positions.

Figure 2 is a similar'view' with partsbroken away a'ndother parts omitted.

Figure 3 is a fragmentary sectional viewon the lineII-IIII of Figure 1.

Figure 4 is-a view similarto that showngin Figure 1,but-illustrating a modification.

Figure 5 is a view similar tothat shown in Figure 4, but with parts broken away and with other parts omitted.

Figure 6 is atop plan or side view of a portion of a machine and illustrating another modification.

Figure 7 is a side elevation or planof the parts shown in Figure 6."

Figure 8 is a face view of a jib shown in Figure 6.

Figure 9 is a side view or plan of a portion of a machine and jib illustrating a further modification. 1 1

Figure 10 is aside elevation or plan of the parts shown inFigure 9.

. Figure 11 isas ide view orplan of a portion of a machine and jib illustrating yetzanother modification.

Figure 12 is a sideelevationor plan of the parts shown in Figure 11,and I portion ofthe Figure 13 is a front view of a portion of these parts.

Like reference numerals indicate like parts throughout thedrawings inwhich the cutter end'of a known type of machine is indicated by the reference numeral land the swin'ging jib 0r cutter bar by the reference 2, the'jib beingpivoted at 3 inknown'manner to swing relatively to the machine frame.

y In the construction shown in Figures 13 it will be seen that one set of'holes 4 of which three are shown, is provided'in a drumf) piv-' otally mounted at 3 and secured'to the jib 2 toro'tate' therewith bymeans of the radially extending member 6 which is attached at 7'to the jib. A band 8 surrounds'the'drum, being anchored at one end at 9 to the machine and having its other end secured to an operating member 'lOby which the band may be tightened around the drum to control the slewing ofthe jib as desired. The aforesaid drum is mounted adjacent the bottom plate 11 of the machine and in this plate theother set of holes 12. is located; 13 is. thelocking bolt. It willbe observed that this set of holes is arranged'in three concentric circles, the, holes in one circle be ng instaggered relation to the holesmanlt tl other circle, and constituting with the set of holes in the movable element the equivalent of two single rows of holes in Vernier relationship to one another. Each row of each set may have a number of holes in Vernier rela tionship to provide a finer adjustment. The staggered arrangement of the holes also e11 I ables ample metal to be left between adjacent holes to resist working stresses.

The holes in the plate or in the drum preferably extend through an arc of about 2410 to enable the jib to be locked in either of its extreme positions or in any intermediate position. I

Figures 4 and 5 show a similar arrangement of the two set of holes but in this case the brake drum is omitted and the holes l are provided. in the radial member 6 which can swing with the jib about the pivot 3.

In the arrangement shown in Figures 68 the set of holes 4, movable with the jib is lo cated in the top face of the jib itself, preferably in a raised bearing piecesuch as 14: thereon, and the other set of holes 12 is arranged around the top platelt? overhanging the ib. Obviously with. this arrangement the pitch between the holes l is different from that of the holes 12 to provide the Vernier adjustment.

In Figures 9 and 10 a similar arrangement is shown, the holes 4c and 153 being replaced by dove tail recesses in the peripheries of the parts 14- and 15, while in Figures ll to 13 recesses are provided in the abutting surfaces of these parts, the locking bolt 13 being adapt-ed to engage the corresponding recesses. Obviously in theseexamples also the recesses are of different pitch to provide the Vernier adjustment.

' t will be understood that the above constructional arrangements are illustrative of the application of the invention to one particular type of machine and that the inveu t on is not limited to such illustrative examples, it being also applicable to other types of machines having a swinging cutting member.

I claim 1. In a inining'machine having aswingable cutting member, the combination with the said cutting member of a brake drum pro vided with a set of locking holes therein and adapted to move with the cutting member about the pivotal axis thereof relatively to an adjacent part of the machine provided with a set of corresponding locking holes, the holes in the said sets being so circularly arranged in a plurality of concentric arcs struck from the member that a hole in one set-will coincide with a hole in the other set at angular inter- 'vals in the rate of ad ustment of the cutting pivotal axis of the cutting member that are substantially smaller than the angular'distances by which the holes in either set are separated from one another, lochi means adapted to engage said coinciding holes, anl braking means adapted to engage said brake-drum.

2. In a mining machine, the combination of pivoted cutting member, a brake-drum rotatzbly mounted on the pivotal axis of said cutting member and having locking holes therein, means operatively connecting said drum to move with said cutting member including a radially extending arm on (lltllll, braking means arranged to ensaid brake drum, and locking means an opted to be engaged with said loosing holes therein and with corresponding locking holes in an adjacent partof the machine.

In a mining machine having a pivoted cutting men'iber, a' brake-drum rotatably,

mounted on the pivotal axis of said cutting membe and movable therewith'relatively to t lined part on theinachine having a set of locking holes therein arranged in a plurality of concentric arcs struck from the said pivotal axis of the cutting member, the holes in one are being staggered in rela tien to the holes in another are, the said brake-drum ha 'ing a second set of locking ,apted to register with holes at angular intervals in the e a a that are smaller than the angular distances by which the holes in each are are separated from one another, locking means adapted to engage the said holes, and braking means aranged to engage the periphery of said nral;e-drum;

e. In a mining machine having a swingable cutting member, a vernier locking device operable between a part mov ng Wltllthe cutting member and a part of the machine which 7 does not partake of swinging movement With:

the cutter bar, said part moving withthe cutting member having a bralnn surface struck on an arc fron' the aXis of swing, andradh therewith.

ally l ing means coact a r ling machine having a swingable cutting vertical plane, a Vernier loclting device operable between a part moving with the cutting member and a part of the machine WillCll does not partake swinging movement withfthe I cutter bar, part moving with the cutting member having a braking surface struck on an are from the axis-of swing, and radially acting braking 7 means coacting therewith. l r In testimony whereof I afiix my signature.

AUSTIN YOUN HOY;

djustment ofthe cutting member n'ieinber mounted to swing in a- 

